The shut off screw on the fuel bowl of my 123 was leaking out the stem. Stem packing nut was TIGHT, so I didn't dare try to screw it in any tighter to adjust it for fear that something would break.
Tried to just buy a new fuel bowl - no go locally.
Bought some very small valve stem packing, but it was way too soft and gummed up the threads.
Had an idea. I got two of the smallest o-rings in my supply box and put them on the shaft of the shutoff stem. Put the stem back in the fuel bowl, gave them just a little bit of compression with the nut and put gas in the tank.
Success! It doesn't leak open or closed, and the valve stem turns easier than it ever did. Now time will tell whether the o-rings are as gasoline resistant as they say they are.
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